Millipore's 37mm Aerosol Analysis Monitors are transparent, disposable, plastic filter holders pre-assembled with Type MF (mixed cellulose esters) Millipore filters. A thin cellulose support seals the filter between monitor sections to distribute sample flow evenly over the filter surface. A three-part design holds the filter in-place when the top section is removed for open aerosol sampling. Applications: aerosol analysis monitors are available with 0.45?m and 0.8?m cellulose esters membranes. Matched weight monitors contain two filters matched in weight to within 0.1 mg, eliminating test filter pre-weighing in gravimetric analysis. Pore Size (?m): 0.8. Filter Diameter, mm: 37. Filter Code: AAWP. Filter Color: White. Filter Surface: Plain. Sterility: Non-Sterile. Filtration Area, cm squared: 9. Pressure/Vacuum: Vacuum. Device Material: Polystyrene.